Chuck



Jan. 1,1924 Y 1,479,325

J. SCHUBNEL CHUCK Filed oct. 8, 1921 y 2 sheets-sheet 1 l @l g gmac-141mm Jan.1, 1924 1,479,325

J. SCHUBNEL CHUCK Filed oct. a, -1921 2 shretssheet 2 a@ aufm@ Patented `lan. l, 1924.

UNITED STATES JOSEPH SCHUBNEL, or Non'rn ADAMS, MASSACHUSETTS.

CHUCK.

Application filed October 8, 1921. Serial No. 506,510.

To all whom z' may concern:

Be it known that I, Josnrn ,SOHUBNEM a citizen of France, residing at North Adams, in the lCounty of Berkshire and State of Massachusetts, have invented new and useful Improvements in Chucks, of which the following is a specification.

This invention relates to chucks which are used for holding drills and vsimilar tools for making holes in metal or other material, and its object is to provide the chuck with a means for countersinking the hole made by the drill, andalso to provide a gage device for determining the depth of the hole made by the drill, as well as. the

-depth of the countersink.

A further object is toprovide a novel and improved arrangement of chuck jaws and other parts which permits the drill to be run up into the chuck body when a very short portion of the drill is required, as when drilling a shallow hole.

The objects stated are attained by means of a novel combination and arrangement of parts to be hereinafter .described yand claimed, and in order that the same may be better understood, reference is had to the accompanying drawings, forming a part of this specification.

In the drawings,

Figure l is an elevation of the tool;

Fig. 2 is an end view thereof partly broken away; v

Fig. 3 is a sectional detail of a gage-adjusting means;

Fig. 11 is a cross-section of a gage ring.

Fig. 5 is a vertical section of the chuck, and Figs. 6 and 7 are cross-sections on the lines 6-6 and 7-7 of Fig. 5.

Referring specifically to the drawing, 5 denotes a drill shank or similar element carrying a chuck which holds the drill 6 the latter being an ordinary twist or other drill. The chuck consists of a body 7 carrying jaws 8` which are operable to grip the drill 6.

In order that a hole may be made by the drill 6, and the hole countersunk with one operation, the outer ends of the jaws 8 which protrude from the chuck body 7, are shaped to form cutters, they being formed with outwardly presented cutting edges 9, and said edges being arranged at an oblique angle to the longitudinal axis of the drill so as to countersink the hole made by the latter as the tool advances and the y'cutting edges 9 enter the hole. The wall of A gage device is also provided for deter mining the depth of the hole made by the drill 6, as well as the depth of the countersink. This gage kdevice is a ring 11 carried by rods 12 mounted for a slidingmovement in the direction of the length of the drill, 1

the ring being positioned at the forward end of the chuck body 7 so that it may encircle the drill 6 and the protruding ends of the jaws 8 having the cutting edges 9.

If the ring is to gage the depth of the hole:

made by the drill 6 itwill be advanced vto encircle the latter a distance from its point corresponding tothe desired depth of the hole. It will therefore be seen that the adkvanceof the drill is stopped whenthe ring.

11 reachesthe work in which a hole is being made by the drill. v To gage the depth of the countersink, .the'rng 11 is set to stop the advance of the tool when the vcutting edges 9l have penetrated the drilled hole a ydisp..y

tance corresponding to the desired depth of the countersink.

The ring 11 is adjusted by a nut 13 mounted on a threaded portion 14 of the shank 5, and having a swiveled connection with a ring 15, to which latter the rods 12 are connected at their rear ends. When the nut 13 is rotated it travels on the threaded portion 14 of the shank 5 and carries the ring 15 along with it, and as said ring carries the rods 12 and the latter are connected to the gage ring 11, said gage kring is advanced or retracted and thus set to determine the de th of the hole and the countersink as herein efore described. The chuck body 7 has longitudinal holes 16 through which the rods 12 slidably pass, andby which they are guided.

The body 7 is cylindrical and hollow, with its forward end tapered to a conical shape, as shown at 7 a, and formed at its extremity with an internal annular ange 10a containing the notches 10 hereinbefore referred to. To grip the drill 6, the jaws 8 are moved downwardly in the body 7, which movement, by reason of the cone 7a, causes them to advance toward each other in an obvious manner.

In order that the jaws 8 may be operated as described, they are carried by a slidable support .consistingzof a cylindrical block 17 loosely mounted in the body 7 so that it may be moved down therein, this being done by the shank 5, the" samev having its'lower end bearing against the top of the block. The

shank 5 is externally threaded and it runsr through a nut 18 seating inthe `top of the body 7 and secured by a screw-threaded lconnection. "'Thejaws y8 are 4advanced to gripithedrill byrscrewing .the-*shank 5 in --a'fdirection'to advance the block 17, and l-when'the shank is unscrewed, the block can lback'to eiect the release movement of the jaws.

'.Thefblock 17 has edge notches 172L in which the l'reduced upper ends' 8a of the j aws 8 seat, 'and Yabove the block, the jaws carry cross f pins Sb'to prevent the jaws from dropping down and away` from the block.

@n the' bottom'o the block 17 are headed screwkfstuds or `similar devices 19 around which are coiled, intermediate their ends,

'sp'ringsl20` engageable with the jaws 8 in 4such a manner that vthey have a normal -spreading tendency, tofacilitate'release of the1drill'6 when the'shank` 5 ,is unscrewed.

As shown iii-Fig. 6, one 'end of a spring 2O eXtendsla-terally from' the studs19 and is insertedinto a ltransverse aperture 20a in a jaw, and the other-end of the spring is anfcliored to the block 17 by being inserted into anaperture 20b in the bottomthereof.

It will be noted in Fig.4 5 thatthe block 17 has'a central aperture and that the shank 5 is hollow. This is for thepurpose of allow edges, a gage ring carried by the chuck body,

and adjustable to project trom the forward end of the chuck body, and having a diameter to encircle the protruding ends of the jaws, a shank carrying the chuck body, and

vhaving a threaded portion, a traveling nut on said threaded portion, rods carrying the gage ring and slidably supported by the chuck body, and a member swiveled to the nut and having a connection with the rods.

2. A. drill chuck comprising a body, drillgripping jaws carried thereby,a gage ring adjustable to project from the forward end of the chuck body, a shank carried by the chuck and having a threaded portion, a traveling nut on said threaded portion, rods carrying they gage ring and slidably supported by the chuck body, and a member swiveled to the nut and having a connection with the rods.

In testimony whereof I aliiX my signature.

JOSEPH SCHUBNEL. 

